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  Indian J Med Microbiol
 

Figure 3: Chest radiograph (postero-anterior view) showing ill-defined lobulated opacity (arrow) in the right lower zone obscuring the right dome of the diaphragm and right costophrenic angle and extending superiorly along the right lateral chest wall into mid and upper zones (a). Axial NCCT of the chest (mediastinal window) (b); CECT of the chest (mediastinal window) (c), (lung window) (d) showing a lobulated mass lesion in the superior segment of right lower lobe (arrow) which is isodense on NCCT (b) and is enhancing homogeneously on CECT (c). Maximum intensity projection image of another patient showing physiological FDG uptake in brain, tonsils, liver, kidney and bladder and abnormal FDG uptake in the left side of thorax (e). Axial CT (f,h) and fused PET-CT (g,i) showing moderately increased FDG concentration in an ill-defined soft-tissue density in the lingular segment in the upper lobe of the left lung measuring 7.4 cm × 7.1 cm × 10 cm with a SUVmax 4.9. The lesion is displacing the trachea and oesophagus to the contralateral side. Axial CT (j) and fused PET-CT (k) showing conglomerate lymph nodal mass in subcarinal, left paratracheal and left hilar regions measuring 6.2 cm × 6.3 cm × 5 cm with SUVmax 3.7. Photomicrograph of CT-guided lung biopsy obtained from the patient shown in Figures a,b,c and d, showing polygonal cells with pleomorphic hyperchromatic nuclei and abundant eosinophilic cytoplasm arranged diffusely suggestive of squamous cell carcinoma (l) (Haematoxylin and eosin, ×200). Photomicrograph of immunohistochemistry showing diffuse cytoplasmic positivity for cytokeratin 5 (m), cytokeratin 6 (n), P63 (o) in the lesional cells of Tru-cut lung biopsy specimen suggestive of squamous cell carcinoma. NCCT = Non-contrast computed tomography; CECT = Contrast-enhanced computed tomography; CT = Computed tomography; PET-CT = Positron emission tomography-computed tomography; SUVmax = Maximum standardised uptake value; FDG = Fluorodeoxyglucose

Figure 3: Chest radiograph (postero-anterior view) showing ill-defined lobulated opacity (arrow) in the right lower zone obscuring the right dome of the diaphragm and right costophrenic angle and extending superiorly along the right lateral chest wall into mid and upper zones (a). Axial NCCT of the chest  (mediastinal window) (b); CECT of the chest  (mediastinal window) (c), (lung window) (d) showing a lobulated mass lesion in the superior segment of right lower lobe (arrow) which is isodense on NCCT (b) and is enhancing homogeneously on CECT (c). Maximum intensity projection image of another patient showing physiological FDG uptake in brain, tonsils, liver, kidney and bladder and abnormal FDG uptake in the left side of thorax (e). Axial CT (f,h) and fused PET-CT (g,i) showing moderately increased FDG concentration in an ill-defined soft-tissue density in the lingular segment in the upper lobe  of the left lung measuring 7.4 cm × 7.1 cm × 10 cm with a SUVmax  4.9. The lesion is displacing the trachea and oesophagus to the contralateral side. Axial CT (j) and fused PET-CT (k) showing conglomerate lymph nodal mass in subcarinal, left paratracheal and left hilar regions measuring 6.2 cm × 6.3 cm × 5 cm with SUV<sub>max</sub> 3.7. Photomicrograph of CT-guided lung biopsy obtained from the patient shown in Figures a,b,c and d,  showing polygonal cells with pleomorphic hyperchromatic nuclei and abundant eosinophilic cytoplasm arranged diffusely suggestive of squamous cell carcinoma (l) (Haematoxylin and eosin, ×200). Photomicrograph of immunohistochemistry showing diffuse cytoplasmic positivity for cytokeratin 5 (m), cytokeratin 6 (n), P63 (o) in the lesional cells of Tru-cut lung biopsy specimen suggestive of squamous cell carcinoma. NCCT = Non-contrast computed tomography; CECT = Contrast-enhanced computed tomography; CT = Computed tomography; PET-CT = Positron emission tomography-computed tomography; SUV<sub>max</sub> = Maximum standardised uptake value; FDG = Fluorodeoxyglucose